<template>
  <view>
    <view class="goods-list">
      <view v-for="(goods, i) in goodsList" :key="i" @click="gotoDetail(goods)">
        <my-goods :goods="goods"></my-goods>
      </view>
    </view>
  </view>
</template>

<script>
  export default {
    data() {
      return {
        //商品请求参数
        queryObj: {
          query: '',
          cid: '',
          pagenum: 1,
          pagesize: 10
        },
        //数据列表
        goodsList: [],
        //总数据条数
        total: 0,
        //节流阀
        isloading:false
      };
    },
    onLoad(options) {
      this.queryObj.query = options.query || ''
      this.queryObj.cid = options.cid || ''
      this.getGoodsList()
    },
    methods: {
      async getGoodsList(cb) {
        //请求前打开节流阀
        this.isloading=true
        const {data: res} = await uni.$http.get('/api/public/v1/goods/search', this.queryObj)
        //请求结束关闭节流阀
        this.isloading=false
        //只要数据请求完毕，立即调用回调函数
        cb&&cb()
        
        if (res.meta.status !== 200) return uni.$showMsg()
        this.goodsList = [...this.goodsList,...res.message.goods]
        this.total = res.message.total
      },
      gotoDetail(goods){
        uni.navigateTo({
          url:'/subpkg/goods_detail/goods_detail?goods_id='+goods.goods_id
        })
      }
    },
    onReachBottom() {
      //判断数据是否显示完毕
      if(this.queryObj.pagenum*this.queryObj.pagesize>=this.total) return uni.$showMsg('数据加载完毕')
      //先判断,如果节流阀打开，说明正在进行请求
      if(this.isloading) return
      this.queryObj.pagenum+=1
      this.getGoodsList()
    },
    //下拉刷新的事件
    onPullDownRefresh() {
      //重置数据
      this.queryObj.pagenum=1
      this.total=0
      this.isloading=false
      this.goodsList=[]
      
      //重新发起请求，传递一个回调函数,关闭下拉刷新的效果
      this.getGoodsList(()=>uni.stopPullDownRefresh())
    }
  }
</script>

<style lang="scss">

</style>
